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7/9/2010 4:42PM

Worth It?: Sun Exposure Apps

Can gadgets determine how much sun is too much sun? Last year, WSJ's Lauren Goode tried to answer that question using a portable UV monitor. This year, she reviews two iPhone apps, Sun Alert and SunIQ, that also aim to help gauge sun exposure.

This transcript has been automatically generated and may not be 100% accurate.

I ... we all know too much ... the idea of how much ... is too much ... now ... there's an app for that ... I downloaded TI lived and applications called subtler can thank you which claimed TDG or UV exposure ... and much or how long she team assigned ... I think that can be tested in each of the fourth of July weekend and also essential part of ... the apps are pretty Chief subtler just a few available for Dollar and thank you is to ninety nine ... one of the great things that using a Smartphone Free or Sundays is they can use your exact location to determine some conditions and exposure levels ... subtler and did not recognize my location I keep conifers SA had to entertain annually from the less ... next I entered my skin type which is tied to Caucasian can plainly ... The sometimes Barron's ... and any SKF of my sunscreen which was thirty ... then using the climate conditions less I'd told subtler it that I was in the open air ... on the beach on a sunny day ... we are told me that the UV index on the beach to seven point seven ... and it was expected St seven point nine liter that day ... an important thing to know is that near the apps actually gain to the UV index themselves with a sensor on your phone ... rather they get you the index information for your location from the European Space Agency and the use that data along with information about years and an esky out ... to me calculations about how long should be in the sun ... subtler calculated I can remain in the sun for four hours ... and thirty three knots ... I like Seth App added a bold countdown clock that kept track of how long I had until bright line ... for a new half hour seemed like a long time now and I wish the act had reminders or alerts to say Hey it's time to reply that sunscreen especially after I won a lot better ... however I did end up staying at these for the management suggested and walk away that day with al visible sunburn so again subtler calculations were on target ... Sankey who didn't have as many bells and whistles the subtler ... the app recognize that I was on cue card right away but only offered for skin tight options with no category descriptions ... that also only offer three climate takes normal Mt Annan cloudy ... an enterprise content is why Nanya recommended sun exposure time of one hour twenty five minutes ... Blanchard may soon take this to the apps that I can see in the sun for four hours and seventeen minutes close to the same amount of time the settler recommended ... but how users really know its content farewell using some IQ with its little bit and only four can suffer ... thank you Streeter says the next version of the Apple include five in Capes along with a description like Boston ferns are usually commands ... as well as customizable cents B free application alerts ... so are the Astorg at ... their chief that don't really do anything to protect your skin in the safety of your information you can access yourself for free from stifling the EPA ... is ultimately when it comes to protecting yourself from the sun amounts of strong sunscreen and an ounce of common sense ... are probably worth more ... from the Wall Street